Piston-ring.



H; E. WQGLERY. PISTON RING. Arrmcuzoz IILEDOOT. 28, 1914.

may 1 1; Patnted Feb. 9,- 1915.

Inventor HEM 0011859;

. a Attorneys a neancnma cameraman; ea ent-a sl s;

To all whom it may concern." 1 i Be it known that l, Henson Efldfooenn'z, a citizen or the United tates, residingst Fairmont, in the count of Martin and State 1 interlocking progecting portions "7 and 3 of Minnesota, have invented a new andnseful Piston-Ring", of which the following is a specification.

The present invention relates to improve ments in piston rings, one object of the invention, being the provision of a ringcornposed of a plurality of annuli, the XIlitl-IL'OT bullring' member of which is of arwidth suificient to accommodate upon thecircuin- 'forence thereof, the two outer rings which lie side by side, the meeting portions'oi'the" respective rings being grooved circumferentiallyand parallelto interfit, to prevent undue Wear between the bull ring and theeuterv sections as is the case, Where the outer sections fit upon the smooth outer surface of the bull ring.

A. further object of the present invention,

is the provision of a piston r'ingpoinposed of three annuli,the' split portions of which alternate to be out of line to thus prevent the passage of gas between thesections, the said annuli being so disposed relatively to each other as to be permitted circumferential but no lateral or transverse 'mov ements'due to the peculiar grooving and connecting means therebetween.

With the foregoing and other objects in view which Will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made ithin the scope of What is claimed WltllOUlT ,,departing from the spirit of the-invention;

In lihe drawingsFig,mre 1 isa plan view of a complete ring made according to and embodving the present invention. Fig. 2 is a section taken on line 2-2 of Fig.1; Fig.

3 is a plan view taken from the outer side of one ring showing the preferred form of joint at the opening thereof. v

Referring to the drawings, the numeral 1 designates the inner annulus, or What is commonly termed,=the bull ring of the piston ring, Whil'edisposed exterior-1y thereof, are the'two outer cvlinder contacting an nuli 2 and 3. The joints 4, 5 and 6. as illustrated in full and dotted lines in Fig.1, are disposed to be out of alinement so that a m in. also nonacn 5n. 'w'ootnn'r or resections,- Minnesota.

vre efs "'ght st 'isefi'ecte the aunt nd Bcome contact with c3 lg-er or the engine These joints as n ameccnstrnctedso as to have the which thus provide a staggered joint to pr z V -fi he ea y-passage gas thereitsetween ing inclined or as illustrated snbstentielly truncated tr angles. The annulus Vlded with the corresponding grooves it"? and ridges 1%, to coiiperate with the ree es tive ri'dges and grooves 9.331611 9 or the annulus l, While the; annulus 3 is provided with the corresuonding grooves lO and the ridges 10:.- t will thus be evident that when the parts are assembled, as illustrated in. Fig 2,

thatalthough the annuli 2 and 3 may have a slight circumferential sliding movement relatively to the/annulus 1, they have no lateral movement and therefore are prevent ed from sliding in that direction that tends to wear the surfaces between -the annuli 2 and 3 and the annulus 1. It has also been found that the grooves and circumferential ridges should be preferably truncated tri angles in cross section or similar to screw threads, but instead of being helical they are made circumferentially parallel so that when the sections or annuh. are once assem- 'bled, the v are maintained against lateral or.

transverse movement;

' What IS claimed is:

hit

'1. A piston ring, composed of an inner as annulus, and two outer annuli disposed thereupon, theIc-ombined Width of which substantially the Width of the innerannnlus, the adjacent. faces of the inner annulus and the outer annuli being provided each with a plurality of interlocking circumierential means to prevent lateral'or transverse are placement or" one relatively to the other.

2A piston ring, composed of an inner annulus, and :two outer annuli disposed tlrierenpon. the combined Width of v hich is substantially the 'Width of the inner annulus, the outer circumferential face of the inner annulus and the inner iace of the outer annuli each being provided with a pin rahtv ofcooperative circumlerentlsll v per the an allel grooves vvhich interlocl-Kto hold 10 allel grooves,

nuli against lateral or transverse movement.

3. A piston ring, comprising an inner annulus, two outer annuli disposed thereupon, the combined width of which is substantially the Width of the inner annulus, the

. outer face of the inner annulus and the lIl-j ner 'faces of the outer annuli being provided with inter-engaging circumferentially pareach groove of which is substantially a truncated triangle in cross section. 1

In testimony that I claim the foregoing as my own, I have hereto afl'ixed my signature in the presence of two witnesses.

HORACE E. WOOLERY.

Witnesses:

H, P. Emvouns, G. F. ANDERSON. 

